Simplifying if-else conditions

Computer Science Level 1

if(checkA){
    if(!checkA || checkB){
        if(checkB){
            return true;
        }
    }
}

Which of the following is equivalent to the above piece of a C++ code?

1
2
3

if(checkA && checkB){
    return true;
}

1
2
3

if(checkA || checkB){
    return true;
}

1
2
3

if(!checkA && checkB){
    return true;
}

1
2
3

if(!checkA || checkB){
    return true;
}

A D B C

1 solution

Kexin Zheng
Jun 23, 2016

The second line of the code can only be reached if the first line was true, and the first line states that checkA has to be true. Therefore, the condition !checkA in the second line will never be true, which leaves the entire statement to be true only when checkB is true. Summing these two conditions, the line "return true" will only be executed when both checkA and checkB are true, giving $\boxed{A}$ as our answer.

Simplifying if-else conditions

1 solution

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